Error 500: Cannot process an HTTP request to servlet [lama_api] in [lama-api] web application

[marie_renneke]

Dear Community,

(probably) since applying SP29 for the Landscape Management components (this Monday) we're facing a problem with getting the activity status via REST API with activities/<activityno>?query=fields=items(activityNumber,status)

It worked fine until now. Suddenly we're facing "500 Internal Server Error" responses and find the following error in LaMas java logs: "Cannot process an HTTP request to servlet [lama_api] in [lama-api] web application. For more details on the problem please check traces searching by logId: C000C2AFA09DB07600000005000052A6"

The only trace / log entry we find with this logId is the quoted one and nothing related during the time period it occured.

And as is always the case - the colleague who wrote the script is not available anymore...

Do you have any idea what changed / what's wrong here out of a sudden? The only thing I see in SAP note 3316859 that might refer to this is "The REST API returns an error when invalid query parameters are sent." - but how come this is suddenly invalid when it worked all the time before ... and I don't see any difference in the API reference...

Hopefully you experts can help us here.

Thanks & regards, Marie

[marie_renneke · Accepted solution]

Dear all,

problem solved completely: we found out the correct syntax through trial and error - so this (hopefully) works now for all Lama APIs - here are two examples:

activities/<act.No>?fields=activityNumber,status

systems/SystemID.<SID>.SystemHost.<Host>?fields=name,systemUUID

Maybe this might help someone else.

Cheers, Marie